linux-stable.git/tools/include, branch linux-6.17.y

tools/nolibc/dirent: avoid errno in readdir_r

2025-12-18T12:59:28+00:00

[ Upstream commit 4ada5679f18dbbe92d87c37a842c3368e6ab5e4a ]

Using errno is not possible when NOLIBC_IGNORE_ERRNO is set. Use
sys_lseek instead of lseek as that avoids using errno.

Fixes: 665fa8dea90d ("tools/nolibc: add support for directory access")
Signed-off-by: Benjamin Berg 
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

tools/nolibc/stdio: let perror work when NOLIBC_IGNORE_ERRNO is set

2025-12-18T12:59:28+00:00

[ Upstream commit c485ca3aff2442adea4c08ceb5183e671ebed22a ]

There is no errno variable when NOLIBC_IGNORE_ERRNO is defined. As such,
simply print the message with "unknown error" rather than the integer
value of errno.

Fixes: acab7bcdb1bc ("tools/nolibc/stdio: add perror() to report the errno value")
Signed-off-by: Benjamin Berg 
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

tools/nolibc: handle NULL wstatus argument to waitpid()

2025-12-18T12:59:14+00:00

[ Upstream commit 812f223fe9be03dc22abb85240b6f075135d2386 ]

wstatus is allowed to be NULL. Avoid a segmentation fault in this case.

Fixes: 0c89abf5ab3f ("tools/nolibc: implement waitpid() in terms of waitid()")
Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

tools bitmap: Add missing asm-generic/bitsperlong.h include

2025-11-13T20:37:38+00:00

[ Upstream commit f38ce0209ab4553906b44bd1159e35c740a84161 ]

small_const_nbits is defined in asm-generic/bitsperlong.h which
bitmap.h uses but doesn't include causing build failures in some build
systems. Add the missing #include.

Note the bitmap.h in tools has diverged from that of the kernel, so no
changes are made there.

Signed-off-by: Ian Rogers 
Acked-by: Yury Norov 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: André Almeida 
Cc: Daniel Borkmann 
Cc: Darren Hart 
Cc: David S. Miller 
Cc: Davidlohr Bueso 
Cc: Ido Schimmel 
Cc: Ingo Molnar 
Cc: Jakub Kicinski 
Cc: Jamal Hadi Salim 
Cc: Jason Xing 
Cc: Jiri Olsa 
Cc: Jonas Gottlieb 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Maurice Lambert 
Cc: Namhyung Kim 
Cc: Paolo Abeni 
Cc: Peter Zijlstra 
Cc: Petr Machata 
Cc: Rasmus Villemoes 
Cc: Thomas Gleixner 
Cc: Yuyang Huang 
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin

tools/nolibc: add stdbool.h to nolibc includes

2025-10-15T10:03:37+00:00

[ Upstream commit 2d965c1ae4135ed6f505661458f6dabd39488dac ]

Otherwise tests compiled with only "-include nolibc.h" will fail with
"error: unknown type name 'bool'", even though a stdbool.h is available
from nolibc.

Fixes: ae1f550efc11 ("tools/nolibc: add stdbool.h header")
Fixes: f2662ec26b26 ("selftests: kselftest: Create ksft_print_dbg_msg()")
Reported-by: Mark Brown 
Closes: https://lore.kernel.org/lkml/833f5ae5-190e-47ec-9ad9-127ad166c80c@sirena.org.uk/
Signed-off-by: André Almeida 
[Thomas: add Fixes tags and massage commit message a bit]
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

tools/nolibc: make time_t robust if __kernel_old_time_t is missing in host headers

2025-10-15T10:03:36+00:00

[ Upstream commit 0ff52df6b32a6b04a7c9dfe3d7a387aff215b482 ]

Commit d5094bcb5bfd ("tools/nolibc: define time_t in terms of
__kernel_old_time_t") made nolibc use the kernel's time type so that
`time_t` matches `timespec::tv_sec` on all ABIs (notably x32).

But since __kernel_old_time_t is fairly new, notably from 2020 in commit
94c467ddb273 ("y2038: add __kernel_old_timespec and __kernel_old_time_t"),
nolibc builds that rely on host headers may fail.

Switch to __kernel_time_t, which is the same as __kernel_old_time_t and
has existed for longer.

Tested in PPC VM of Open Source Lab of Oregon State University
(./tools/testing/selftests/rcutorture/bin/mkinitrd.sh)

Fixes: d5094bcb5bfd ("tools/nolibc: define time_t in terms of __kernel_old_time_t")
Signed-off-by: Zhouyi Zhou 
[Thomas: Reformat commit and its message a bit]
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

tools/nolibc: avoid error in dup2() if old fd equals new fd

2025-10-15T10:03:23+00:00

[ Upstream commit d1ff0e2d13d6ac3a15be7870e15216726b0a809a ]

dup2() allows both 'old' and 'new' to have the same value, which dup3()
does not. If libc dup2() is implemented through the dup3() system call,
then it would incorrectly fail in this case.

Avoid the error by handling old == new explicitly.

Fixes: 30ca20517ac1 ("tools headers: Move the nolibc header from rcutorture to tools/include/nolibc/")
Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Link: https://lore.kernel.org/r/20250820-nolibc-dup2-einval-v2-1-807185a45c56@linutronix.de
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

tools/nolibc: fix error return value of clock_nanosleep()

2025-10-15T10:03:19+00:00

[ Upstream commit 1201f6fb5bfdbd10985ac3c8f49ef8f4f88b5c94 ]

clock_nanosleep() returns a positive error value. Unlike other libc
functions it *does not* return -1 nor set errno.

Fix the return value and also adapt nanosleep().

Fixes: 7c02bc4088af ("tools/nolibc: add support for clock_nanosleep() and nanosleep()")
Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Link: https://lore.kernel.org/r/20250731-nolibc-clock_nanosleep-ret-v1-1-9e4af7855e61@linutronix.de
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

Merge tag 'perf-tools-fixes-for-v6.17-2025-08-27' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

2025-08-28T02:18:51+00:00

Pull perf-tools fixes from Namhyung Kim:
 "A number of kernel header sync changes and two build-id fixes"

* tag 'perf-tools-fixes-for-v6.17-2025-08-27' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools:
  perf symbol: Add blocking argument to filename__read_build_id
  perf symbol-minimal: Fix ehdr reading in filename__read_build_id
  tools headers: Sync uapi/linux/vhost.h with the kernel source
  tools headers: Sync uapi/linux/prctl.h with the kernel source
  tools headers: Sync uapi/linux/fs.h with the kernel source
  tools headers: Sync uapi/linux/fcntl.h with the kernel source
  tools headers: Sync syscall tables with the kernel source
  tools headers: Sync powerpc headers with the kernel source
  tools headers: Sync arm64 headers with the kernel source
  tools headers: Sync x86 headers with the kernel source
  tools headers: Sync linux/cfi_types.h with the kernel source
  tools headers: Sync linux/bits.h with the kernel source
  tools headers: Sync KVM headers with the kernel source
  perf test: Fix a build error in x86 topdown test

tools/testing: add linux/args.h header and fix radix, VMA tests

2025-08-19T23:35:54+00:00

Commit 857d18f23ab1 ("cleanup: Introduce ACQUIRE() and ACQUIRE_ERR() for
conditional locks") accidentally broke the radix tree, VMA userland tests
by including linux/args.h which is not present in the tools/include
directory.

This patch copies this over and adds an #ifdef block to avoid duplicate
__CONCAT declaration in conflict with system headers when we ultimately
include this.

Link: https://lkml.kernel.org/r/20250811052654.33286-1-lorenzo.stoakes@oracle.com
Fixes: 857d18f23ab1 ("cleanup: Introduce ACQUIRE() and ACQUIRE_ERR() for conditional locks") 
Signed-off-by: Lorenzo Stoakes 
Cc: Jann Horn 
Cc: John Hubbard 
Cc: Liam Howlett 
Cc: Sidhartha Kumar 
Cc: Vlastimil Babka 
Cc: Dan Williams 
Cc: Peter Zijlstra 
Signed-off-by: Andrew Morton